I have never heard anything come up before about vision as it would be apparent in other areas I would imagine not just gross movement but for sure children with hearing issues have commonly also got an issue with balance. It's hard for us to say without seeing the child whether it is mindless all over the place as though he has no control (think tiny drunk person) or whether he is just rough and bashing through everything with complete disregard. If he is rushing around everywhere then I wouldnt have thought it is a serious issue versus an annoying phase he will likely get over but if he isnt speeding all over the place and moving slowly and acting this way, then I would think there is cause for concern. Just observe and document just the facts with zero opinion and if it goes on for to much longer then pass the paperwork to the parents and ask if they can follow up with the family dr as you are concerned about this behaviour in your daycare.